Localization of sperm during microdissection testicular sperm extraction in men with nonobstructive azoospermia.

Purpose: We determined the location where sperm were identified during microdissection testicular sperm extraction and characterized the subset of patients for whom complete bilateral exploration was most beneficial.

Materials And Methods: A total of 900 men underwent a first attempt at microdissection testicular sperm extraction. Sperm extraction began with an initial wide incision in the larger testis.